The observation of supernovae aroused Tycho's great interest in astronomical research. Based on his observation data, he wrote an important book, On Novas, which is the first book in the world to discuss supernova explosions in detail. It is of great significance in the history of world astronomy. King Frederick II of Denmark attached great importance to Tycho's astronomical research. He not only gave Tycho a generous salary, but also gave Tycho Hefen Island near Copenhagen, Denmark, and allocated huge sums of money to build an observatory for him.
The observatory built by Frederick II for tycho brahe was completed in 1576. This is the famous Ulanburg Observatory on Hefen Island. It is the first modern observatory in Europe and even in the world. Because of the establishment of this observatory, Hefen Island has become an active astronomical research center, and many famous scholars come here from all over the world to visit and study. This observatory has played an important role in the development of astronomy in Europe and the world.
In order to better carry out astronomical research. Tycho carefully designed and manufactured many large and precise astronomical observation instruments. These instruments are made of wood, iron and copper. The largest one is a high-precision quadrant with a straight line of 39 feet. Later people called it "Tycho Quadrant".
Tycho has worked in Hefen Island for twenty years, and has made outstanding achievements in astronomical observation, recording and research. Because of the improvement of the accuracy of his observation instrument and the correction of atmospheric refraction effect, his astronomical observation accuracy far exceeds that of his predecessors. Tycho's astronomical observation is tens to hundreds of times more accurate than the best one before. He continuously observed the positions of 777 constant stars. In addition, the catalogue with the least error is compiled. He observed, studied and recorded the movements of the moon, planets and comets in detail, and obtained a large number of accurate and valuable astronomical observation data and accurate data and records. He made many new astronomical discoveries and recorded many new astronomical phenomena in his life. Many of these achievements are world class. However, in the history of world astronomy, among all tycho brahe's discoveries, astronomers agree that the most important discovery in his life is that of the greatest astronomer, John Kepler, who has been famous for his later generations.
Tycho worked in Hefen Island for twenty years, which was the golden age of his academic research. However, after the death of King Frederick II of Denmark, Tycho lost his supporters and sources of funds, and the research work could not continue. At this very difficult time, he received an invitation from King Rudolf of Austria, moved to Austria, and managed to transport the musical instruments on Hefen Island to Austria.
Tycho's work in Austria is inefficient because he has no assistant. When he was in a dilemma, he received a book called "The Mystery of the Universe" and an enthusiastic letter written by a young German named "John Kepler".
John Kepler's views are clearly expressed in the book. He believed in Heliocentrism of Copernicus, and Tycho was a believer in Ptolemy's geocentric theory. Despite the differences, Tycho saw from his letters and books that he was a rare talent who really devoted himself to the scientific cause. So he immediately wrote to Kepler and asked him to be his assistant in Prague. Few graduate tutors in our universities today can have Tycho's mind, and the vast majority of graduate students with different views are resolutely unacceptable. Teachers like Tycho are rare. It is said that Kepler and Tycho once quarreled because of Kepler's lazy wife's instigation, but when Kepler realized his mistake, Tycho immediately forgave him.
Although tycho brahe has mastered abundant, accurate and complete astronomical observation data, the system he used for astronomical observation is an eclectic cosmic system. In Tycho's system, all the planets revolve around the sun except the earth, and the sun guides the planets to revolve around the earth, and the earth is at rest in the center of the universe. Although Tycho also understood Copernicus' system, he thought that Heliocentrism's thought was against the Bible and unacceptable. Therefore, his observation data did not play its due role.
John Kepler thinks Tycho is the richest man, but he doesn't know how to use his wealth. It is said that Tycho gave Kepler the observation data before he died, and said that Kepler could only use these data under the geocentric system. However, when Tycho died, Kepler immediately combined Tycho's precise observation data with Copernicus' Heliocentrism system.
1600 The meeting between Tycho and Kepler in Prague on February 4 was one of the major events in the history of science, which marked the combination of two foundations of modern natural science: empirical observation and mathematical theory. The mathematical principle of Copernicus system that Kepler believed in was combined with the precise observation data of tycho brahe, which finally made Kepler uncover the secret of the whole solar system.